/*******************************************************************************
 * Copyright 2005-2010, Andrew McVeigh.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package com.intrinsarc.backbone.parserbase;

public class LiteralPatternMatcher implements IPatternMatcher
{
	private String literal;
	
	public LiteralPatternMatcher(String literal)
	{
		this.literal = literal;
	}

	public LiteralPatternMatcher()
	{
	}

	public boolean matches(Token tok)
	{
		return tok.getType().equals(TokenType.LITERAL) && (literal == null || tok.getText().equals(literal));
	}

	public String getDescription()
	{
		return new Token(TokenType.LITERAL, literal).toString();
	}
}
